Safety control and shutoff device



Sept. 3, 1M0. H. A. MANTZ 2,213,

SAFETY common AND SHUTOFF DEVICE Filed Nov. 10, 1938 2 Sheets-Sheet. l

Sept. 3, 1940. A -r2 2,233,84Q

SAFETY CONTROL AND SHUTOFF DEVICE Filed Nov. 10, 1938 2 Sheets-Sheet 2 45 Wig 7 2w Patented Sept. 3, 1940 UNITED STATES PATENT oFFicE SAFETYCONTROL AND SHUTOFF DEVICE Application November 10, 1938, Serial No.239,795

18 Claims.

This invention relates to a safety control and shutoff device.

The illustrated embodiment of the invention is in the form of a combinedthermo-electric safety control device and shutoff cock of the generalcharacter shown and described in the copending application of John H.Thornbery, filed November 10, 1938, Serial No. 239,791.

While the particular device which I shall describe hereinafter inconnection with the drawings has the valve member of the thermo-electriccontrol device connected to the armature for movement to open and closedpositions with movement of the armature to attracted and retreatedpositions, it is to be understood that the invention is not limited touse in this particular form of device but may be employed in all similarforms of devices-by way of example, in devices in which the movement ofthe armature controls a switch connected in circuit with a solenoidvalve which is operable to open and close the fuel supply line to theburner.

One of the main objects of my invention is to provide means which willpermit resetting the armature to the position in which it is apated tobe held by the electromagnet and the valve controlled thereby to openposition only when the shutoff cock is closed to shut off the supply offuel to the burner and which means is operable to prevent resetting ofthe control device when the shutoff cock is in open position.

In its more specific aspects this means for permitting resetting of thecontrol device only when the shutoff cock is closed and for preventingresetting of the control device when the shutoff cock is in openposition is in the form of an interlock which acts to prevent resettingmovement of the reset stem when the shutoff cock is open and permitsresetting movement of the reset stem when the shutoff cock is closed.

It is also an object of my invention to provide a combined safetycontrol device, shutofi cock and interlock of relatively simple andinexpensive construction, and which may be installed and operatedconveniently and effectively; also a device of this character composedof relatively few parts and adapted for convenient and expeditiousmanufacture and assembly.

Further objects and advantages of the inven-,

tion will be apparent from the following detailed description taken inconnection with the accompanying drawings, in which:

Figure 1 is an elevational view of a safety control and shutoff deviceembodying the present invention, showing the same more or lessdiagrammatically in a pilot burner and main burner fuel supply system;

Figure 2 is an axial section through the safety control and shutoffdevice on an enlarged scale and taken on the line 2-2 of Figure 1;

Figure 3 is a detail section taken on the line 33 of Figure 2;

Figure 4 is a detail section taken on the line 44 of Figure 2; and

Figure 5 is a bottom plan view of the device 10 shown in Figure 2, on areduced scale.

Referring to the drawings, the burner [0, shown fragmentarily in Figure1, is any suitable or preferred main burnerby way of example, for anoven, or for a room heater or a water 15 heater, or it may be one of themain top burners of a gas range, .or any other main burner.

A pipe ll supplies gaseous or other suitable fuel to the burner Ill, anddisposed in juxtaposition to the burner i0 is a pilot burner l2 which 20maintains a pilot light l3 for igniting the main burner. The pilotburner I2 is supplied with fuel by a tube l4 connected to the valve bodyof the thermo-electric control device as will be herein after described,although it is to be understood 25 that this pilot fuel supply tube l4may be connected otherwise, for example to the pipe ll anterior to thecontrol device.

The thermo-electric control device, designated inits entirety at l8,comprises a valve body 20 having an inlet 2| and an outlet 22 forconnection intogthe fuel supply pipe II. The thermocouple and leadconductor means therefor is shown broken away in Figure l and at rightangles to the position in which the terminalmeans for the thermocoupleis connected to the control device. This is merely for facility of i1-lustration.

The lead connection cap and magnet and armature housing assembly is ofthe general character disclosed and claimed in the copending applicationof Clarence Wantz, filed November 10, 1938,. S'erial No. 239,790. Thelead connection cap zdf'which is preferably formed of Bakelite or anyother suitable or preferred insulating ma- 45 terial, may be of theexternal form shown in Figure 1 and has at its lower end, as viewed inFigure 2, an integral cylindrical extension 25 which fits into acounterbore 26 at the upper end of the bore 23 in the valve body 20. Thecap 24 50 is fastened in place upon the top of the valve body 20 by capscrews 27, preferably with a sealing gasket or washer 28 between the capand the valve body.

The magnet housing 30 is in the form of an 55 upwardly openingcup-shaped metal shell mounted on the cap 24, for example by securepressed fit engagement of its open upper end in the cap 24 at 32. Thehousing or shell 30 is reduced at its lower end at 33, and the armaturehousing 34, which is also in the form of an upwardly opening cup-shapedmetal shell, is mounted on the shell 30, for example by secure pressedfit engagement of its open upper end telescopically over the reducedlower end 33 of the shell 30. The lower end of the shell 34 ispreferably reduced, as shown.

The electromagnet comprises a generally U- shaped magnet frame 36positioned within the shell 30, with its legs extending through openingsin the lower end of this shell and presenting pole ends within thearmature housing 34. The magnet frame 36 has a threaded stud 37 weldedor otherwise rigidly joined thereto at 31, or formed integral therewith.This stud 31 extends into an opening or recess 38 in the top of the.

cap 24 and has threaded engagement with a nut member 39 for clamping themagnet frame rigidly and, at the same time, removably in place. The nutmember 39 has a kerf 40 for engagement by a screw driver or othersuitable tool, and a spring washer may be provided between the nutmember 39 and the bottom of the recess 38 as indicated at 4|.

Fixed rigidly in the cap 24, as, for example, by molding the insulatingmaterial of the cap thereto and extending endwise from the cap, are apair of spaced metallic terminal connectors 42 and 43 having alignedopenings 44 and split outwardly of these openings as shown at 45. Theelectromagnetic coil 46 surrounds the legs of the magnet frame 36 andthe leads or ends of this coil extend out through the terminalconnectors 42 and 43 and have their bared ends connected to the terminalmembers 42 and 43 at 41 and 48, respectively, in a manner to have goodconducting contact therewith. The connections at 4'! and 48 are showndisposed outside of the cap 24 and laterally of the openings forreceiving the terminal means on the terminal lead conductors. The coil46 is preferably covered with insulation between its bared ends.Suitable insulation may, if and as desired, be interposed between theturns of the coil and the legs of the magnet frame 36, and insulationmay be provided between the lower ends of the shell 30 and the adjacentend of the coil 46 as shown, by way of example, at 52.

The armature 55 is disposed in the armature housing 34 and is adapted tobe held in attracted position against the pole ends of the magnet frame36 upon energization of the electromagnet. The armature 55 is ofdisc-like form, and is secured to the upper end of a reciprocatory valvestem 51. The attachment of the armature to the valve stem 51, at 58, ispreferably sufficiently loose, as indicated, to permitself-accommodation of the armature to the pole ends of the magnet frameby a generally universal movement of the armature upon the upper end ofthe valve stem. The stem 51 is disposed generally concentrically of thearmature housing 34 and extends downwardly for reciprocating movementthrough an opening 60 in the lower'end of the housing 34.

The valve member 62 is fixed by a pin 63 upon the lower end of the valvestem 51, preferably for some relative movement thereon so as to haveself -accommodating seating engagement with the cooperating valve seat64 at the upper end of the valve sat member 65. Packing 68, of felt orother suitable or preferred material, is interposed between the bottomof the armaturehousing 34 and a. metal valve spring seating disc 69. Thevalve spring 10 is in the form of a coiled compression spring interposedbetween the valve member 62 and the springseating disc 69, and centered,if desired, at opposite ends about integral hub-like portions on thevalve member 62 and valve seating disc 69. The spring I0 resilientlymoves the armature 55 to retracted position and the valve member 62 intoseating engagement with the valve seat 64 to shut off the flow of fuelto the outlet 22 and thereby to the main burner l0 when theelectromagnet is deenergized.

The disc 69 seats downwardly upon a shoulder 72 in the bore 23 of thevalve body 2|], and the action of the spring 10 tends to compress thepacking 68 and maintain same in sealing engagement with the bore 23 andthe valve stem 51 to seal the interior of the armature housing 34 fromthe gaseous or other fuel which passes through the valve body, and toseal the valve body against the escape of fuel out around the connectioncap and magnet and armature housing assembly. The device is furthersealed against the escape of fuel by the gasket or Washer 26.

The lead connection cap and magnet and armature housing assembly is ofsimple and inexpensive construction, and is adapted to be applied to andremoved from the valve body 20 or similar structure expeditiously and asa unitary structure. At the same time the armature housing 34 isdetachable from the magnet housing 30 to permit access to the armature35 and the pole ends of the magnet frame 36. The magnet housing 38 mayalso be adapted for detachment from the lead connection cap 24 to permitaccess to the magnet frame 36 and magnet coil 46.

The thermocouple and lead connection therefor are of the generalcharacter disclosed and claimed in Oscar J. Leins Patent No. 2,126,564,granted August 9, 1938. The thermocouple 15 comprises an outer tubularmetallic thermocouple member 16 and an inner metallic thermocouplemember 11 disposed within the outer thermocouple member and joined atone end to the end of the outer thermocouple member to form the thermaljunction 18 which is placed in position to be heated by the pilot lightI3. An inner lead conductor 19 is joined to the inner thermocouplemember to form an internal thermal junction 80, and an outer tubularlead conductor 8| is connected to the outer tubular thermocouple memberthrough a sleeve 8| to form a third thermal junction 82. The outer leadconductor 8| encloses the inner lead conductor and the innerthermocouple member 80. The inner lead conductor 19 is insulated fromthe outer lead conductor by a wrapping of insulation on the inner leadconductor, as indicated at 84.

The inner and outer lead conductors 19 and BI are preferably of acharacter that will permit bending, as desired, to permit disposing thethermocouple in any desired position. At the same time, the leadconnection is preferably of a character to support the thermocouple inany desired position, although supporting brackets or other means may beemployed for supporting the thermocouple and lead connection. At theopposite end, the inner lead conductor 19 extends from the outer leadconductor 8|, and has a metallic terminal sleeve 86 fixed thereon ingood conductive contact therewith and spaced from the end of the outerlead conductor 8|. An insulating sleeve 81 is interposed between theterminal sleeve 86 and the adjacent end of the outer lead conductor 8|.

A quick detachable connection is thus provided between the thermocouplelead and the terminals 42 and 43 for the electromagnet coil 46. Thethermocouple is connected to the terminals 42 and 43 by slipping theterminal end of the thermocouple lead means through the opening 44 inone terminal 43 and into the opening 44 in the other terminal, with theterminal sleeve 86 in the opening 44 in one terminal 42 and the end ofthe tubular thermocouple lead 8| in the opening 44 in the other terminal43. The screws 90 are then tightened to clamp the split portions 45 ofthe terminals 42 and 43 into good conductive contact and grippingengagement with the terminal sleeve 86 and tubular lead 8|,respectively. The thermocouple is disconnected from the device byloosening the screws 90 and withdrawing the terminal end of thethermocouple leads from the terminals 42 and 43.

The quick detachable connection thus provided permits the thermocouple,with its leads, to be detached from the control device in shipment. At.the same time, the thermocouple may be connected to the control deviceexpeditiously, and, when connected, good conductive contact is assured.This is important where the current is a relatively weak thermoelectriccurrent such as that produced by the heat of the pilot light I3 on thethermal junction I8 of the thermocouple.

The heat of the pilot light I3 upon the thermocouple is suflicient tohold the armature 55 in attracted position and the valve member 62 inopen position, as shown, when the armature is engaged with the pole endsof the magnet frame, but this thermo-electric current is not capable ofmoving the armature to attracted position and the valve member 62 toopen position. In order, therefore, to provide for opening the valvemember 62 and for setting the armature to attracted position uponinitial operation of the device, and to reset the device after the samecloses to shut off the fuel supply when the pilot light is extinguished,reset means is provided, and. this reset means is combined with theshutoff cock generally in the manner described and claimed in thecopending application of John H. Thornbery, filed November 10, 1938,Serial No. 239,791.

The shutoff cock is in the form of a hollow truncated conical plug 95,with its conical surface seated in a corresponding truncated conicalbore 96 in the lower end of the valve body 20. Treaded upon the lowerend of the valve body 20 is a spring cap 91 which may be knurledexternally as shown in Figure 1. Disposed within the cap 91 and abuttinga shoulder 98 on the plug member 95 is a stop or abutment disc 99. Acoiled spring I is interposed between the stop or abutment disc 99 andthe lower end of the cap 91, and acts to maintain the conical surface ofthe plug 95 resiliently and, at the same time, tightly seated ,in thebore 96. The plug 95 has an opening or port I02 which is adapted to bemoved into and out of register with the outlet 22 by rotation of theplug 95.

For the purpose of rotating the plug 95, its outer end has a handlepiece or knob I04 fixed thereon. The handle I 04 may be fixed upon theplug 95 to turn the same therewithfor example, by splaying the outer endof the plug member 95 and providing the handle I04 with acorrespondingly formed opening for locking engagement therewith. Ahandle screw I05, threaded internally to the outer end of the plugmember 95 and having its head cooperating with the handle member I04 asshown, locks the handle member removably in place upon the plug 95.

The reciprocatory reset stem I06 is disposed centrally within theshut-off plug member 95 in position coaxial with the valve member 62.Its lower end projects from the lower end of the handle screw I and hasa reset button I08 threaded or otherwise fixed thereon. The reset buttonI08 has sliding movement in the axial opening I09 in the screw I05, andinterposed between the reset button or a flange on the adjacent end ofthe stem. I06 and a spring disk I I0 is a coiled reset return springII2. Packing H4 is interposed between the spring disk H0 and an internalflange II5 on the plug member 95. The stem I06 has reciprocatorymovement through the disk H9 and packing H4 and in the plug member 95.

The upper surface of the flange I I5 presents a valve seat H8, and fixedon the stem I06 for reciprocatory movement therewith is a reset valvemember I 20. In the position shown, the valve member I20 is seated uponthe seat II8 by the spring H2, which returns the reset stem to projectedposition and prevents the escape of fuel outwardly along the stem I06and reset button. The packing II4 acts cumulatively with .the valvemember I20 to prevent the escape of fuel when the valve member I20 isseated as shown, and the packing II4 prevents the escape of fueloutwardly along the stem I06 during the resetting operation.

The tube II for. supplying fuel to the pilot burner I2 is connectedthrough a connector fitting I25 (Figure 1) and a port I26 (Figure 2) tothe valve chamber I21. The port I26 opens into the chamber I2! below thevalve seat 64 and above the upper end of the plug 95, so that when thevalve 62 is open, fuel will be supplied to the pilot burner regardlessof whether the shutoff plug 95 is open or closed. The connector fittingI25, through which fuel is supplied to the pilot burner, is providedwith means indicated at I28 for shutting off the supply of fuel to thepilot burner and with a metering screw I29 for metering the supply offuel to the pilot burner.

In the illustrated embodiment of the invention, two diametricallyopposite pilot supply ports I26 are provided as shown in Figure 1. Eachport I 26 is provided with an internally threaded coaxial opening sothat the fitting I25 may be threaded into either such openingselectively as desired. The other opening is closed by a removable screwI30.

For the purpose of permitting resetting of the armature 55 to theposition in which it is adapted to be held by the electromagnet and thevalve 62 to-open position only when the shutoif cock is closed, i. e.,only when the cock 95 is turned to position in which the opening or portI02 is completely out of register with the outlet 22 and to permitresetting of the control device when the shutoff cock is open, 1. e., inposition with the port or opening I92 in partial or completeregistration with the outlet 22, the lower threaded end I40 of the valvebody 20 is cut away or removed through approximately one-quarter of itscircumference to form an opening I4I.

An interlocking pin I 42 is mounted for sliding movement in a lateralopening I43 in the plug 95 in the plane of the opening I4I. A ballmember I44, also slidable in the opening I43, is disposed betwcen theinner end of the pin I42 and the reset stem I06. An annular spring wireI48,

disposed in an annular recess I43 in the plug 95 and secured at one endto the plug at I50, engages at its opposite end in a groove I52 intheinterlocking pin I42, and normally holds this pin yieldingly inretracted position within the inner periphery of the adjacent end I40 ofthe valve body 20. The disk 89 is fixed on the lower end of the valveplug 95 against turning movement relative thereto by splaying the sidesof the plug, as indicated at I65 in Figure 4-, and forming the openingin the disk 99 of conforming configuration. The disk 99 has a lug I88which operates in the slot or circumferential opening MI and limits therotation of the shutoff cock to about 90 degrees, in one extremity, withthe port I02 in full registration with the outlet 22 and, at the otherextremity, with the port I02 completely out of register with the outlet22.

When the plug 95 is in position with the shutoff port I02 completely outof registration with the outlet 22, the pin I42 is in register with thecircumferential opening Then when the reset sleeve I06 is pressedupwardly, the shoulder I10 (Figure 2), formed by a sleeve or enlargedportion on the stem I05 by engagement with the ball member I44, forcesthe pin I42 out radially into the opening I4I against the tension of thespring I48, freeing the reset stem for completion of the resettingoperation. When, however, the plug 95 is in position with the shutoifport I02 completely or partiallyin register with the outlet 22, the pinI42 is out of register with the circumferential opening MI in the lowerend of the valve body. If it is attempted to press the reset stem I06upwardly to reset the device with the plug 95 so positioned, the pinI42, as the shoulder I'I0 tends to force same outwardly, engages theinner periphery I15 of the lower end of the valve body, and the ballmember I44 is then incapable of moving outwardly sufficiently to freethe reset stem I05 for completion of the resetting operation.

The foregoing provision assure against escape of fuel from the mainburner during the resetting operation, because the plug "95' must berotated to shutoff position to free the interlock device so that thearmature may be reset to attracted position and the valve 62 to openposition. At the same time, when the plug 95 is turned to shutofiposition, the interlock device is freed and the reset stem I06 is thencapable of sufficient upward movement to reset the device.

The operation of the device isas follows:

When the pilot light is burning, the heat thereof upon the thermaljunction '18 produces a thermo-electric current in the coil 45. Themagnet frame 35 and armature 55 are preferably formed of an alloy ofrelatively low magnetic reluctance, and, as a result, the relativelyweak thermoelectric current produces a magnetic field of sufficientstrength so that when the armature 55 is placed in contact with the poleends of the magnet frame by pushing the reset button I08 upwardly, themagnetic attraction holds the armature in raised or attracted positionagainst the magnet frame with a force greater than the force exerted bythe spring I0, thereby holding the valve 62 in open position so long asthe pilot flame is burning.

If the pilot flame is extinguished, the holding action of theelectromagnet ceases to be sufiicient to hold the armature 55 and valve62 in attracted position, and the spring 10 moves the valve member 62 toclosed position. The armature 55 moves to retracted position with the MIin the valve body.

ture.

movement of the valve 62 to closed position, and the closing of thevalve 62 shuts off the supply of fuel to the main burner and pilotburner.

When it is desired to reset the device, the shutoff plug 95 is turned,-by grasping the handle I04, to position completely to shut off thesupply of fuel to the main burner. This releases the interlock, and thereset button I08 is engaged with the hand and pressed upwardly. Theaccompanying upward movement of the stem I06 brings the upper end of thestem into contact with the valve member 62, and continued upwardmovement of the reset stem moves this valve member and the valve stem 51and armature 55 upwardly as a unit until the armature comes into contactwith the pole ends of the magnet frame 38, or is brought into attractedposition and the valve member 62 is positioned in open position asshown. This operation opens the supply of gas or other fuel to the pilotburner I2 only.

If the pilot burner is lighted and sets up a thermoelectric current tohold the armature in attracted position, the valve 62 will remain open,and when the resetting button I08 is released, the spring II2 returnsthe reset button and stem I05 to downwardly projected position as shown.As the reset stem moves downwardly the valve member I engages the seatII8 to seal the passage around the stem against the escape of fuel. Theplug or shutoff cock 95 can then be rotated to open the port I02 inorder to supply fuel to the main burner I0. If, on the other hand, thepilot burner is not lighted to produce the thermo-electric currentforholding the valve 62 open, this valve will move to closed positionupon release of the button I08 so that no gas whatsoever will flow fromthe inlet to the pilot burner and main burner.

In order to turn on or shut off the supply of fuel to the main burner,for example with the pilot light burning and the armature 55 held inattracted position and valve 62 open, the handle I member I04 is graspedand turned to rotate the plug member 95. With the opening I02 in comfuelto the main burner. By rotating the plug 95 until the opening I02 iscompletely out of register with the outlet 22, the supply of fuelthrough the outlet 22 and thereby the supply of fuel to the main burneris completely shut oif. Intermediate supplies of fuel through the outlet22 may be provided by intermediate amounts of regizsgration of theopening I02 with the outlet From the foregoing description it will beapparent that the shutoff cock and reset means for the thermo-electriccontrol device and the interlock therebetween areof simple andinexpensive construction and are adapted to be applied to and removedfrom the valve body 20 or similar structure expeditiously and as aunitary struc- The shutoff cock and reset and interlock unit, whenapplied to the valve body 20, constitute a unitary part of the controldevice, and

the device is adapted to be operated conveniently and effectively andrequires less joints or connections in the fuel supply line. The deviceis composed of relatively few parts as compared with separate devices,and the parts are adapted for convenient manufacture and assembly.

I do not intend to be limited to the precise details shown or described.

I claim:

1. In a device of the character described. in

. 2,213,844 combination, acontrol device having an electromagnetprovided with an armature connected to a controlling member and adaptedwhen energized to hold said member in operating position and whendeenergized to release said member for movement to a safety position, ashutoff cock, reset means for resetting said armature to attractedposition and said controlling member to operating position, and meansfor preventing the resetting operation of said reset means except whensaid shutofi cock is closed.

2. In a device of-the character described, in combination, a controldevice having an electromagnet provided with an armature connected to acontrolling member and adapted when energized to hold said member inoperating position and when deenergized to release said member formovement to a safety position, a shutofi cock mounted in said controldevice, a reset stem mounted in said shutoff cock and operable to resetsaid armature to attracted position and said controlling member tooperating position, and interlock means between said reset stem and saidshutofi cock for preventing resetting operation of said reset stemexcept when said shutoii cock is closed.

3. In a device of the character described, in combination, a valvebody,having inlet and out let openings and provided at one end with anelectromagnet having an armature connected to a valve member within saidvalve body and adapted when energized to hold said valve member in openposition and when deenergized to release said valve member formovementto closed position, the opposite end of said valve body havingagenerally conical bore, a generally conical shutofi cock mounted in saidbore for controlling the flow through said valve body, a reset stemmounted in said shutofi cock and operable to reset said armature toattracted position and said valve member to open position, and interlockmeans between said reset stem and said shutoff cock for preventingresetting operation of said reset stem except when said shutofi cock isclosed. r 1

4. In a device of the character described, in combination, a valve bodyhaving an electromagnet provided with an armature connected to a valvemember within the valve body and adapted when energized to hold saidvalve member in open position and when deenergized to release said valvemember for movement to closed position, a shutofi cock mounted in thevalve body for controlling the flow through said valve body, a resetstem mounted in said shutofi cock and operable to reset said armature toattracted position and said valve member to open position, and a detentmounted for lateral movement'in said shutoff cock, said detent havinginterlocking engagement with said reset stem to prevent resettingoperation of said stem when said shutofi cock is in open position andfreed for movement out of interlocking engagement with said reset stemto permit resetting operation of said tem when said shutoff cock isclosed.

5. ma device of the character'described, in

operable to reset said armature to attracted position and said valvemember to open position, a detent mounted for lateral movement in saidshutoff cock, said detent having interlocking engagement with said resetstem to prevent resetting operation of said stem when said shuto'il cockis in open position and freed for movement out of interlockingengagement with said reset stem to permit resetting operation of saidstem when said shutofi cock is closed, and spring means engaging saiddetent and normally holding same in position for interlocking engagementwith said reset stem.

6. In a device of the character described, in combination, a valve bodyhaving an electromagnet provided with an armature connected to a valvemember within the valve body and adapted when energized to hold saidvalve member in open position and when deenergized to release said valvemember for movement to closed position, a shutoff cock mounted in thevalve body for controlling the flow through said valve body, a resetstem mounted in said shutofi cock and operable to reset said armature toattracted position and said valve member to open position, a detentmounted for lateral movement in said shutoii cock, said detent havinginterlocking engagement with said reset stem to prevent resettingoperation of said stem when said shutofi cock is inopen position andfreed for movement out of interlocking engagement with said reset stemto permit resetting operation of said stem when said shutoff cock isclosed, and a valve member carried by said reset stem for sealing thevalve body against leakage along said reset stem.

7. In a device of the character described, in combination, a valve bodyhaving an electromagnet provided with an armature connected to a valvemember within the valve body and adapted when energized to hold saidvalve member in open position and when deenergized to release said valvemember for movement to closed position, a shutofi cock mounted in thevalve body for controlling the iiow through said valve body, a resetstem mounted in said valve body and operable to reset said armature toattracted position and said controlling member to operating position,and a detent mounted for lateral movement in said shutoff cock, saidvalve body having an opening in the plane of said detent, said detentbeing positioned for registration with said opening when the shutoffcock is in closed position and out of register with said opening whenthe shutoff cock is open, said'reset stem being freed for resettingoperation by actuating said detent into said opening when the shutoficock is closed and locked against resetting operation by engagement ofsaid detent with the valve body when the shutofi cock is open.

8. In a device of the character described, in combination, a valve bodyhaving an electromagnet provided with an armature connected to a valvemember within the valve body and adapted when energized to hold saidvalve member in open position and when deenergized to release said valvemember for movement to closed position, a shutoff cock mounted in thevalve body for controlling the flow through said valve body, a resetstem mounted in said valve body and operable to reset said armature toattracted position and said controlling member to operating position, adetent mounted for lateral movement in said shutoff cock, said valvebody having an opening in the plane of said detent, said 75 detent beingpositioned for registration with said opening when the shutoff cock isin closed position and out of register with said opening when theshutoff cock is open, said reset stem being freed for resettingoperation by actuating said detent into said opening when the shutoffcock is closed and locked against resetting operation by engagement ofsaid detent with the valve body when the shutoff cock is open, and aspring secured to the shutoff cock and engaging said detent normally tomaintain same yieldingly out of the opening in the valve body.

9. In a device of the character described, in combination, a valve bodyhaving an electromagnet provided with an armature connected to a valvemember within the valve body and adapted when energized to hold saidvalve mem-- ber in open position and when deenergized to release saidvalve member for movemnt to closed position, a shutoff cock mounted inthe valve body for controlling the flow through said valve body, a resetstem mounted in said valve body and operable to reset said armature toattracted position and said controlling member to operating position, adetent mounted for lateral movement in said shutoff cock, said valvebody having an opening in the plane of said detent, said detent beingpositioned for registration with said opening when the shutoff cock isin closed position and out of register with said opening when theshutoff cock is open, said reset stem being freed for resettingoperation by actuating said detent into said opening when the shutoffcock is closed and locked against resetting operation by engagement ofsaid detent with the valve body when the shutoff cock is open, and astop member splined upon said shutoff cock and having a lug engaging inthe opening in the valve body for limiting rotation of said shutoffcock.

10. In a device of the character described, in combination, a valve bodyhaving an electromagnet provided with an armature connected to a valvemember within the valve body and adapted when energized to hold saidvalve member in open position and when deenergized to release said valvemember for movement to closed position, -a shutoff cock mounted in thevalve body for controlling the flow through said valve body, a resetstem mounted in said valve body and operable to reset said armature toattracted position and said controlling member to operating position, adetent mounted for lateral movement in said shutoff cock, said valvebody having an opening in the plane of said detent, said detent beingpositioned for registration with said opening when the shutoff cock isin closed position and out of register with said opening when theshutoff cock is open, said reset stem being freed for resettingoperation by actuating said detent into said opening when the shutoffcock is closed and locked against resetting operation by engagement ofsaid detent with the valve body when the shutoff cock is open, a stopmember splined upon said shutoff cock and having a lug engaging in theopening in the valve body for limiting rotation of said shutoff cook, aspring cap attached to the valve body, and a spring interposed betweensaid stop member and said cap for maintaining the shutoff cock seated inthe generally conical bore in said valve body.

11. In a device of the character described, in combination, a valvebody, a shutoff cock mounted in said valve body for controlling the flowthrough said valve body, a reset stem mounted in said shutoff cock,means adapted to be reset by said reset stem, and detent means mountedin said shutoff cock for. preventing operation of said reset stem exceptwhen said shutoff cock is closed.

12. In a device of the character described, in combination, a valvebody, a shutoff valve mounted in said valve body for controlling theflow through said body, reset means mounted for reciprocatory movementin said shutoff valve, means adapted to be reset by said reset means,and means for preventing reciprocatory movement of said reset meansexcept when said shutoff valve is closed.

13. In a device of the class described, in combination, a valve body, ashutoff valve mounted in said valve body, reset means mounted forresetting operation in said valve, means adapted to be reset by saidreset means, and internally disposed means for preventing operation ofsaid reset means when said valve is open and permitting resettingoperation of said means when said valve is closed.

14. In a device of the class described, a shut-' off valve, a reset stemmounted for reciprocatory movement, means adapted to be reset byreciprocatory movement of said stem, and means cooperable with'said stemand movable laterally thereof when the valve is closed to permit oper-'is open.

15. In a device of the class described, thermoelectricsafety means, ashutoff valve, reset means for resetting said thermoelectric safetymeans, and means for preventing the resetting operation of said resetmeans except when said valve is closed.

16. In a device of the class described, thermoelectric safety means, acontrolling member having different positions, reset means for resettingsaid thermoelectric safety means, and means for preventing the resettingoperation of said reset means when said controlling member is in oneposition and free to permit the resetting operation of said resetmeanswhen said controlling member is in a different position.

17. In a device of the character described, in combination, a controlbody, a controlling member mounted in said body and having at least twodifferent positions, reset means, means adapted to be reset by saidreset means, and means disposed within said control body for preventingoperation of said reset means when said controlling member is in one ofsaid positions and permitting operation of said reset means when saidcontrolling member is in a different position.

18. In a device of the class described, in combination, a shutoff valvemounted for movement to different positions, reset means mounted foroperation in said valve, means adapted to'be reset by said reset means,abutment means, and means mounted in said valve and cooperable with saidreset means and with said abutment means for preventing operation ofsaid reset means when said valve is in one position and free to permitoperation of said reset means when said valve is in another position.

HAROLD A. MANTZ.

DISCLAIMER 2,213,844.-Harold A. Mantz, Milwaukee, Wis. SAFETY CONTROLAND SHUTOFF EVICE. Patent dated September 3, 1940. Disclaimer filedJanuary 31, 1944, by the assignee, Milwaukee Gas Specialty Company; theinventor, as'senting, Hereby enters this disclaimer to claims 1, 14, 15,and 16 of said patent.

[Qficial Gazette February 29, 1944.]

DISCLAIMER 2,213,844.--Harold A. Manta, Milwaukee, Wis. SAFETY CONTROLAND SHUTOFF DEVICE. Patent dated September 3, 1940. Disclaimer filedJanuary 31,

1944, by the assignee, Milwaukee Gas Specialty Company; the inventor,

assenting..

Hereby enters this disclaimer to claims 1, 14, 15, and 16 of saidpatent.

[Qficial Gazette Febmqry 29, 1944.]

